Analysis and research on the bearing capacity of thin-walled cabin section made of carbon fiber reinforced plastics

Abstract

The aerospace field puts forward high requirements for aircraft bearing capacity and lightweight. This paper takes a thin-walled cabin structure suitable for small aircraft as the research object, the finite element software ABAQUS is used to model and simulate the thin-walled reinforced compartment. The thin-walled compartments of composite materials (CFRP) and metal materials are modeled separately using shell cells. The mechanical properties of carbon fiber reinforced polymer (CFRP) thin-walled cabin and metal thin-walled cabin under the same loading mode are compared by using the nonlinear explicit dynamic analysis method. The results show that after the buckling of CFRP thin-walled cabin structure, the displacement support reaction curve has an upward trend, the structure enters the secondary bearing stage, the bearing capacity decreases not significantly or even increases, while the bearing capacity curve of metal thin-walled cabin decreases significantly after the buckling deformation; The mass of CFRP thin-walled cabin is 86.48% of that of aluminum alloy thin-walled cabin, but the bearing capacity increases by 194.42%.